A sealing device for making bags from PET film

Abstract

The utility model discloses a kind of sealing device for PET film bag making, including sealing device main body, sealing station, sealing plate and PET bag main body, the central position of the top of sealing device main body is provided with sealing station, and PET bag main body is placed on the sealing station, one end of the top of the sealing station is provided with sealing part, and the sealing station on the both sides of sealing part is evenly distributed with suction hole, the end of the top of the sealing station away from sealing part is provided with 2 groups of positioning block, the top of sealing device main body is erected with frame body, and the top of the inside of frame body is provided with sealing plate by lifting plate, the top of frame body is fixed with pneumatic cylinder, and the output end of pneumatic cylinder is connected with lifting plate by telescopic column.The utility model is equipped with sealing device main body, sealing station, PET bag main body, positioning block, bidirectional screw rod, knob, movable sleeve, suction hole and vacuum pump, expand the use range of sealing device main body, increase the versatility of equipment.

Description

Technical Field

[0001] This utility model relates to the field of bag sealing technology, specifically a sealing device for PET film bag making. Background Technology

[0002] A PET film bag sealing device is a piece of equipment used to seal bags made of PET film. It typically uses a heating element to heat the PET film, bringing the sealing area to a certain temperature. Under pressure, the two layers of the film fuse together to form a strong seal.

[0003] To prevent the bag from shifting during sealing and ensure accurate sealing, the bag is usually fixed in place. For example, a packaging bag sealing device disclosed in patent number CN210028185U uses an air suction hole and a positioning block to make the packaging bag fit tightly against the fixing plate to prevent the packaging bag from shifting. However, the positioning block is fixed to the fixing plate, which is not conducive to adjusting the size of the bag to be sealed, and has poor versatility. Utility Model Content

[0004] The purpose of this invention is to provide a sealing device for PET film bag making to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A sealing device for PET film bag making, comprising a sealing device body, a sealing platform, a sealing plate, and a PET bag body. A sealing platform is provided at the center of the top of the sealing device body, and the PET bag body is placed on the sealing platform. A sealing part is provided at one end of the top of the sealing platform, and air suction holes are evenly distributed on both sides of the sealing part. A vacuum pump is provided in the sealing platform below the sealing part. Two sets of positioning blocks are provided at the top of the sealing platform away from the sealing part, and a groove is provided in the sealing platform below the positioning blocks. A bidirectional lead screw is provided inside the groove, and movable sleeves are respectively fitted at both ends of the bidirectional lead screw. The top ends of the movable sleeves are connected to the positioning blocks. A frame is mounted on the top of the sealing device body, and a sealing plate is provided at the top of the frame body through a lifting plate. A cylinder is fixed on the top of the frame body, and the output end of the cylinder is connected to the lifting plate through a telescopic column.

[0006] Preferably, a knob is provided at the bottom end of one side of the sealing platform, and the knob is connected to a bidirectional lead screw.

[0007] Preferably, guide blocks are provided on both sides of the lifting plate, and guide grooves matching the guide blocks are provided on both sides of the interior of the frame.

[0008] Preferably, a center plate is provided at the center of the sealing plate, and an installation groove is provided at the center of the center plate. A heating element is provided inside the installation groove, and a temperature sensor is provided on the center plate on one side of the installation groove.

[0009] Preferably, heat-conducting plates are provided on both sides of the central plate, and the heat-conducting plates are made of mica material.

[0010] Preferably, slide rails are provided on both sides of the bottom of the sealing platform, and slide grooves matching the slide rails are provided on both sides of the top of the sealing device body.

[0011] Preferably, a guide rod is provided at the bottom of the groove, and a guide sleeve is provided at the bottom of each movable sleeve.

[0012] Preferably, the air intake holes are symmetrically distributed about the sealing portion, and the output end of the vacuum pump is connected to the air intake holes through connecting pipes.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This PET film bag sealing device consists of a sealing device body, a sealing platform, a PET bag body, a positioning block, a bidirectional screw, a knob, a movable sleeve, an air suction hole, and a vacuum pump. The PET bag body is placed on the sealing platform, and the air suction hole is connected to the vacuum pump through a pipe. When the vacuum pump is started, it continuously extracts air from the pipe and the air suction hole, making the air pressure at the air suction hole lower than the external atmospheric pressure, thereby creating a negative pressure environment. This ensures that the bag opening of the PET bag body is tightly attached to the sealing part. At the same time, the positioning block limits the position at the two corners at the bottom of the PET bag body. By rotating the knob, the bidirectional screw can be rotated forward or backward, causing the movable sleeve to move closer or further apart. This allows the position of the positioning block to be adjusted freely according to the specifications of the PET bag body that needs to be limited. This enables the sealing device body to handle PET bag bodies of various sizes, expanding the application range of the sealing device body and increasing the versatility of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a frontal cross-sectional view of the present invention.

[0016] Figure 2 This is a top view of the sealing platform of this utility model.

[0017] Figure 3 This is a front view cross-sectional structural diagram of the sealing platform of this utility model;

[0018] Figure 4 This is a schematic diagram of the sealing plate structure of this utility model;

[0019] Figure 5 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Sealing device body; 2. Sealing platform; 3. Positioning block; 4. Frame; 5. Sealing plate; 6. Cylinder; 7. PET bag body; 8. Lifting plate; 9. Slide groove; 10. Sealing section; 11. Vacuum pump; 12. Suction hole; 13. Two-way lead screw; 14. Movable sleeve; 15. Knob; 16. Slide rail; 17. Center plate; 18. Mounting groove; 19. Heating element; 20. Heat-conducting plate; 21. Guide block; 22. Guide groove; 23. Groove; 24. Temperature sensor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-5 An embodiment of this utility model is provided: a sealing device for making PET film bags, including a sealing device body 1, a sealing platform 2, a sealing plate 5 and a PET bag body 7. The sealing platform 2 is provided at the center of the top of the sealing device body 1, and the PET bag body 7 is placed on the sealing platform 2.

[0023] The sealing platform 2 has slide rails 16 on both sides of its bottom, and the sealing device body 1 has grooves 9 on both sides of its top that match the slide rails 16.

[0024] The sealing table 2 is pulled out by sliding the slide rail 16 in the slide groove 9, and the PET bag body 7 is placed on top of the sealing table 2, making the feeding process safer.

[0025] A sealing section 10 is provided at one end of the top of the sealing platform 2, and air suction holes 12 are evenly distributed on both sides of the sealing platform 2 of the sealing section 10. A vacuum pump 11 is provided inside the sealing platform 2 below the sealing section 10.

[0026] The suction holes 12 are symmetrically distributed about the sealing part 10, and the output end of the vacuum pump 11 is connected to the suction holes 12 through connecting pipes.

[0027] The output end of the vacuum pump 11 is connected to the suction port 12 through a connecting pipe. When the vacuum pump 11 is started, it draws out the air in the pipe and the suction port 12, making the air pressure at the suction port 12 lower than the external atmospheric pressure, forming a negative pressure environment. Under the action of the pressure difference, the bag opening of the PET bag body 7 is tightly attached to the sealing part 10.

[0028] Two sets of positioning blocks 3 are provided at the top of the sealing platform 2 away from the sealing part 10, and a groove 23 is provided in the sealing platform 2 below the positioning block 3. A two-way screw rod 13 is provided inside the groove 23, and movable sleeves 14 are respectively fitted at both ends of the two-way screw rod 13. The top of the movable sleeves 14 are connected to the positioning block 3.

[0029] A knob 15 is provided at the bottom of one side of the sealing table 2, and the knob 15 is connected to the bidirectional lead screw 13. Rotating the knob 15 will drive the bidirectional lead screw 13 to rotate in the forward or reverse direction, so that the movable sleeve 14 and the positioning block 3 move closer or separate from each other, thereby adjusting the positioning block 3 to a suitable position and limiting the two corners at the bottom of the PET bag body 7, so that the PET bag body 7 remains stable during the sealing process and prevents it from shifting or deviating.

[0030] The specifications of the PET bag body 7 can be freely adjusted according to the needs, so that the sealing device body 1 can handle a variety of different sizes of PET bag bodies 7, which expands the application range of the sealing device body 1 and increases the versatility of the equipment.

[0031] A guide rod is provided at the bottom of the groove 23, and a guide sleeve is provided at the bottom of the movable sleeve 14. The movable sleeve 14 can be guided to move in a specific direction, ensuring that the movable sleeve 14 can only move in a straight line under the drive of the bidirectional screw 13, and will not shake or deviate. This ensures that the positioning block 3 can accurately limit the PET bag body 7, and improves the positioning accuracy and reliability.

[0032] The top of the sealing device body 1 is supported by a frame 4, and a sealing plate 5 is provided at the top of the inside of the frame 4 through a lifting plate 8. A center plate 17 is provided at the center of the sealing plate 5, and an installation groove 18 is provided at the center of the center plate 17. A heating element 19 is provided inside the installation groove 18.

[0033] A cylinder 6 is fixed on the top of the frame 4, and the output end of the cylinder 6 is connected to the lifting plate 8 through a telescopic column. When the cylinder 6 works, it drives the lifting plate 8 to move downward, which in turn drives the sealing plate 5 installed at its bottom to descend, so that the sealing plate 5 contacts the PET bag body 7 placed on the sealing table 2, and heats the bag opening of the PET bag body 7, so that the PET film at the bag opening melts and fuses together, thus realizing the sealing operation.

[0034] A temperature sensor 24 is provided on the center plate 17 on one side of the mounting groove 18 to monitor the temperature of the sealing plate 5 in real time. The temperature sensor 24 converts the temperature signal into an electrical signal and transmits it to the temperature control system. The temperature control system receives the signal from the temperature sensor 24 and compares it with the preset temperature value.

[0035] When the detected temperature is lower than the preset value, the control system will increase the current of the heating element 19 to generate more heat, thereby increasing the temperature of the sealing plate 5. When the detected temperature is higher than the preset value, the control system will decrease the current of the heating element 19 to reduce the heat generation, thereby lowering the temperature of the sealing plate 5, thus achieving temperature control of the sealing plate 5.

[0036] Guide blocks 21 are provided on both sides of the lifting plate 8, and guide grooves 22 matching the guide blocks 21 are provided on both sides of the frame 4. The guide blocks 21 on both sides of the lifting plate 8 match the guide grooves 22 to ensure the stability of the lifting plate 8 during the descent process.

[0037] Both sides of the center plate 17 are provided with heat-conducting plates 20, and the heat-conducting plates 20 are made of mica material, which can quickly and evenly conduct the heat generated by the heating element 19 in the center plate 17 to the surface of the sealing plate 5, making the surface temperature distribution more uniform, avoiding local overheating or undercooling, improving the consistency of heating, and thus improving the sealing quality.

[0038] The specific models and specifications of cylinder 6, heating element 19, temperature sensor 24 and vacuum pump 11 need to be determined by selection calculation based on the specifications and parameters of the device. The selection calculation method is existing technology, so it will not be described in detail.

[0039] Working principle: In this embodiment, the sealing platform 2 is pulled out by sliding the slide rail 16 in the slide groove 9, and the PET bag body 7 is placed on top of the sealing platform 2. The output end of the vacuum pump 11 is connected to the suction hole 12 through the connecting pipe. When the vacuum pump 11 is started, it draws air from the pipe and the suction hole 12, making the air pressure at the suction hole 12 lower than the external atmospheric pressure, forming a negative pressure environment. Under the action of the pressure difference, the bag mouth of the PET bag body 7 is tightly attached to the sealing part 10. At the same time, the knob 15 is turned to drive the bidirectional screw 13 to rotate in the forward or reverse direction, so that the movable sleeve 14 and the positioning block 3 move closer or separate from each other, thereby adjusting the positioning block 3 to a suitable position and limiting the two corners at the bottom of the PET bag body 7, so that the PET bag body 7 remains stable during the sealing process and prevents it from shifting or deviating. Then the cylinder 6 works, driving the lifting plate 8 along the guide grooves 2 on both sides inside the frame 4. 2. Moving downwards, the guide blocks 21 on both sides of the lifting plate 8 match the guide groove 22 to ensure the stability of the lifting plate 8 during the descent process. When the lifting plate 8 descends, it drives the sealing plate 5 installed at its bottom to descend, so that the sealing plate 5 contacts the PET bag body 7 placed on the sealing table 2, heating the bag opening of the PET bag body 7, so that the PET film at the bag opening melts and fuses together, realizing the sealing operation. A center plate 17 is set in the center of the sealing plate 5. A heating element 19 is set inside the mounting groove 18 of the center plate 17. The heating element 19 generates heat after being energized. The heat-conducting plates 20 on both sides of the center plate 17 are made of mica material, which evenly conducts the heat, so that the heat generated by the heating element 19 in the center plate 17 can be quickly and evenly conducted to the surface of the sealing plate 5, making the surface temperature distribution more uniform, avoiding local overheating or undercooling, improving the heating consistency, and thus improving the sealing quality.

[0040] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0043] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sealing device for making PET film bags, characterized in that, The device includes a sealing device body (1), a sealing platform (2), a sealing plate (5), and a PET bag body (7). The sealing platform (2) is located at the center of the top of the sealing device body (1), and the PET bag body (7) is placed on the sealing platform (2). A sealing part (10) is provided at one end of the top of the sealing platform (2), and air suction holes (12) are evenly distributed on both sides of the sealing platform (2) of the sealing part (10). A vacuum pump (11) is provided in the sealing platform (2) below the sealing part (10). Two sets of positioning blocks are provided at the end of the top of the sealing platform (2) away from the sealing part (10). (3), and a groove (23) is provided in the sealing platform (2) below the positioning block (3). A two-way screw (13) is provided inside the groove (23), and movable sleeves (14) are respectively fitted at both ends of the two-way screw (13). The top of the movable sleeves (14) is connected to the positioning block (3). A frame (4) is mounted on the top of the sealing device body (1), and a sealing plate (5) is provided at the top of the frame (4) through a lifting plate (8). A cylinder (6) is fixed on the top of the frame (4), and the output end of the cylinder (6) is connected to the lifting plate (8) through a telescopic column.

2. The sealing device for PET film bag making according to claim 1, characterized in that: A knob (15) is provided at the bottom of one side of the sealing platform (2), and the knob (15) is connected to the bidirectional lead screw (13).

3. The sealing device for PET film bag making according to claim 1, characterized in that: Guide blocks (21) are provided on both sides of the lifting plate (8), and guide grooves (22) matching the guide blocks (21) are provided on both sides inside the frame (4).

4. A sealing device for making PET film bags according to claim 1, characterized in that: A center plate (17) is provided at the center of the sealing plate (5), and an installation groove (18) is provided at the center of the center plate (17). A heating element (19) is provided inside the installation groove (18), and a temperature sensor (24) is provided on the center plate (17) on one side of the installation groove (18).

5. A sealing device for making PET film bags according to claim 4, characterized in that: Both sides of the central plate (17) are provided with heat-conducting plates (20), and the heat-conducting plates (20) are all made of mica material.

6. A sealing device for PET film bag making according to claim 1, characterized in that: The sealing platform (2) has slide rails (16) on both sides of its bottom, and the sealing device body (1) has grooves (9) on both sides of its top that match the slide rails (16).

7. A sealing device for making PET film bags according to claim 1, characterized in that: A guide rod is provided at the bottom of the groove (23), and a guide sleeve is provided at the bottom of each of the movable sleeves (14).

8. A sealing device for PET film bag making according to claim 1, characterized in that: The suction holes (12) are symmetrically distributed about the sealing part (10), and the output end of the vacuum pump (11) is connected to the suction holes (12) through connecting pipes.

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